Hadith: Paradise and Hellfire argued with each other (each claiming to be better than the other). Paradise said: The weak and poor will enter me. Hellfire said: The tyrants and arrogant will enter me. He said to Hellfire: You are My punishment with which I will exact revenge upon whomever I wish. Then He said to Paradise: You are My mercy with which I will show mercy to whomever I wish

عن أبي هريرة رضي الله عنه قال: قال رسول الله صلى الله عليه وسلم : «احتجَّت الجنةُ والنارُ، فقالت الجنةُ: يدخلني الضعفاءُ والمساكينُ، وقالت النار: يدخلني الجبَّارون والمتكبِّرون، فقال للنار: أنتِ عذابي أنتقم بك ممَّن شئتُ، وقال للجنة: أنتِ رحمتي أرحمُ بك مَن شئتُ».
[صحيح] - [متفق عليه بمعناه، وهذا لفظ الترمذي]

Abu Hurayrah (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said: “Paradise and Hellfire argued with each other (each claiming to be better than the other). Paradise said: ‘The weak and poor will enter me.’ Hellfire said: ‘The tyrants and arrogant will enter me.’ He said to Hellfire: ‘You are My punishment with which I will exact revenge upon whomever I wish.’ Then He said to Paradise: ‘You are My mercy with which I will show mercy to whomever I wish.’”
[Authentic hadith] - [Al-Bukhari and Muslim narrated a Hadith with that meaning]

Explanation

The Prophet (may Allah's peace and blessings be upon him) informs us that Paradise and Hellfire argued before their Lord, meaning that each of them presented the proofs of its superiority, each claiming to be better than the other. This is one of the matters of the unseen which we must believe in even if our minds deem it unlikely. Paradise argued with Hellfire, saying that the weak and poor from mankind will be in it, for most of them are those who incline towards the truth and submit to it. Then Hellfire argued that the tyrants – who are stern and harsh – will be in it, as well as the arrogant – who are haughty, proud, despise others and deny the truth. The tyrant and arrogant are the inhabitants of Hellfire – Allah’s refuge is sought – because most of the time they do not submit to the truth. Then Allah, the Almighty, judged between them, saying to Hellfire: You are My punishment with which I will punish whomever I wish, and will exact revenge upon whomever I wish. Then He said to Paradise: You are My mercy with which I will show mercy to whomever I wish, meaning that it is the abode that was created out of the mercy of Allah. It is not His mercy that is one of His permanent attributes, rather, the mercy mentioned here is a creature. ‘You are My mercy’ means ‘I created you from My mercy, and with you I will show mercy to whomever I wish.’ The inhabitants of Paradise are the people of Allah’s mercy, whereas the inhabitants of Hellfire are the people of Allah’s punishment.